As you may or may not remember, Serious Eats recently conducted a painstaking fast-food french-fry taste test. And Burger King's big, crispy fries were deemed to be just as good as McDonald's seemingly unbeatable version. Well, now Todd Brock is back giving the same treatment to onion rings, that most underappreciated of fast-food sides. McDonald's and Wendy's don't offer onion rings, of course, so Brock compares rings from Hardee's (known elsewhere as Carl's Jr.), Sonic, Burger King, and Jack in the Box, judging them based on serving size, structure, onion flavor, and coating flavor. Sonic's offering is deemed to be irredeemably greasy. Jack in the Box and Hardee's get dinged for blandness. Burger King, meanwhile, emerges victorious, with onion rings that offer the right amount of onion flavor, an exceptionally good coating, and an array of all-important dipping sauces to keep the whole thing interesting. So now you know. [Serious Eats]